Search for Invisible Decays of a Higgs Boson Produced in Association with a Z Boson in ATLAS - Aad, G; Abajyan, T; Abbott, B; Abdallah, J; Khalek, SA; Abdinov, O; Aben, R; Abi, B; Abolins, M; AbouZeid, O; Abramowicz, H; Abreu, H; et al. (2014)